Yes, it's clear, and because freetrack (software) is free, it's a good idea, but the money you will spend for the tryout, will go on building the equipment. As I said webcam.. ok, but you have also to build the tracker: so you need about 20€ for that.
If you like DIY stuff.. I can tell you it's fun. I got mine working, but not at the quality of the bought one (not so smooth).
Here in the forums, some guys made a tracker that uses only a webcam, maybe it's best to try that one.
---------- Post added at 07:00 AM ---------- Previous post was at 06:57 AM ----------
Right! The question is how practical it would be.